折射对泵浦激光在圆柱靶里的光路、吸收和烧蚀的影响
EFFECT OF PUMPING LASER REFRACTION ON ITS PATH, ABSORPTION AND ABLATION IN THE FIBERTARGET
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摘要: 用一维非平衡辐射流体力学和光路程序计算和分析了泵浦激光在圆柱靶里， 考虑有折射和无折射两种情况下泵浦激光的传播、吸收和靶烧蚀。计算表明，考虑激光折射的影响后，激光光路明显不同，靶烧蚀深度减小，激光能量吸收效率下降10%左右。Abstract: The absorption efficiency of the pumping energy and laser ablation and the pumping laser propagate amony a carbon fibertarget are calculated using 1D noLTE radiation hydromechanics code and geometrical optics path code, in which the refraction effect is considered. The results show that there is a distribution along the line focusing width from the centre to the edging. It has less effect to the laser refract, near the centre of the line focusing width, and it has obvious effect to the laser refract, in the edging of the line focusing width.As a result of calculation the ablative mass of the plasma turns smaller ,and the absorption efficiency of laser total energy is reduced about 10%．
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Key words:
- carbon fiber target /
- turning point /
- laser refract
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